When we talk about religion we cannot dine the forbidden things like alcohol, prostitution and many other things in this topic we will discuss why do gambling is forbidden (Haram, interdit) .
So can you tell me why is it forbidden in your religion?
And for the non religious persons what you think ?
At the end of the day religion was invented to try to explain how to have a better future.
Different religions differ a bit in how to do it, but basically most of them try to aim for a never reachable perfection (God).
Sins are basically things that will make your future life on Earth hell, say alcohol in excess today will make your future pretty bad. That's the idea of hell, a bad future.
On the other hand, if you stay in the right path and not commit any sins, you have the chance of having a great life in the future, that is, live in heaven.
It's not meant for after you die, it's simply the future.